var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');
var cors = require("cors")
var expressJWT = require("express-jwt")


var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();
app.use(cors())

// //注册token验证中间件
// app.use(expressJWT({
//   //解析口令 需要和加密的时候保持一致
//   secret: "flag",
//   //加密方式 SHA256 加密方式在express-jwt 里面叫做 HS256
//   algorithms: ["HS256"]
// }).unless({
//   //不需要验证token 的路径标识（下面的路由不需要进行token验证）
//   path: ["/login"]
// }))


// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};
  console.log(err);
  // render the error page
  // res.status(err.status || 500);
  // res.render('error');
  if(['invalid_token','credentials_bad_format','credentials_required'].includes(err.code)){
    res.send({
      code:err.status
    })
    return
  }
});

module.exports = app;
